252 
ate 15-19 mic., spore cells six, a larger one at one end. Reaction 
with potash, yellow. 
This plant has a general southern range, extending from the 
low sections of Florida to Mexico, where it is common in 
the neighborhood of San Luis Potosi. Mr. Calkins and C G. 
Pringle. 
GRAPHIS BALBISII, Nyl. Thallus uneven, granulose to 
minutely papillose, broken by fissures into a somewhat irregular 
crust, from ash-color to a delicate yellow. Apothecia elevated, 
contorted, gyrose and diffiform supporting a thickened and stout 
inflexed border which is distinctly brighter in color than the 
thallus. The spores are long-fusiform to  long-ellipsoid, 
plurilocular and contain numerous spore cells, averaging from 14 
to 20, mostly decolorate, 47-%4 mic. 
On barks in the mountains near Monterey, Mexico, Mr. C. 
G. Pringle, No. 119. 
GRAPHIS LACTEA, (Nyl.) Thallus contiguous, diffuse, from 
smooth becoming furrowed and irregularly broken in minute 
fissures, pale ashy inclining to a delicate saffron color, limited and 
bordered by a distinct darkening hypothalline line. Apothecia 
irregular, diffiform, concave with raised borders, which are more 
or less white and mealy. Spores large, broadly ellipsoid, slightly 
curved, plurilocular, having about eight septa, the apical cells 
larger, $$-46 mic. 
On the bark of J/ex, San Luis Potosi, Mexico, Mr. C.G. 
Pringle, No. 210 (Fissurina lactea, Nyl.) A well-defined type of 
the section Fissurina which may be better developed in more 
equatorial regions, 
__GRAPHIS ANGUILLIFORMIS, Nyl. Thallus thin, generally 
diffused over largeareas, smooth and shining and frequently broken 
by long transverse fissures, from white to ashy and darker. 
Apothecia simple, very numerous, from short gradually length- 
ening and bent in different directions, very conspicuous and ele- | 
vated, black with a paler thalline border. Spores numerous 
spindle-shaped, plurilocular, decolorate, 54-83 mic. ; spore coe 
from 14 to 20. y 
Reaction with potash, yellow. 
On barks San Luis Potosi, Mexico, Mr. C. G. Pringle, No 
166. The general appearance is not unlike some forms of G. scripta, 
to which it has been referred. 
GRAPHIS PERALBIDA, Nyl. Thallus leprous, thinly attached | 
